src/tooltip.cpp

   1 /*
   2   Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>
   3
   4   This library is free software; you can redistribute it and/or
   5   modify it under the terms of the GNU Library General Public
   6   License as published by the Free Software Foundation; either
   7   version 2 of the License, or (at your option) any later version.
   8
   9   This library is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12   Library General Public License for more details.
  13
  14   You should have received a copy of the GNU Library General Public License
  15   along with this library; see the file COPYING.LIB.  If not, write to
  16   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17   Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include <QApplication>
  21 #include <QCursor>
  22 #include <QFrame>
  23 #include <QPainter>
  24 #include <QPixmap>
  25 #include <q3simplerichtext.h>
  26 //Added by qt3to4:
  27 #include <Q3ValueList>
  28 #include <QEvent>
  29 #include <kglobal.h>
  30 #include <kapplication.h>
  31
  32 #include "debug.h"
  33 #include "tooltip.h"
  34
  35 class Amarok::ToolTip::Manager: public QObject
  36 {
  37 public:
  38     Manager( QObject *parent ): QObject( parent ) { kapp->installEventFilter( this ); }
  39     virtual ~Manager()
  40     {
  41         for( int n = Amarok::ToolTip::s_tooltips.count() - 1; n >= 0; --n )
  42             delete Amarok::ToolTip::s_tooltips[n];
  43     }
  44
  45     bool eventFilter( QObject*, QEvent *e )
  46     {
  47         switch ( e->type() )
  48         {
  49             case QEvent::KeyPress:
  50             case QEvent::KeyRelease:
  51             case QEvent::MouseButtonPress:
  52             case QEvent::MouseButtonRelease:
  53             //case QEvent::MouseMove:
  54             case QEvent::Wheel:
  55                 ToolTip::hideTips();
  56                 break;
  57             case QEvent::FocusIn:
  58             case QEvent::Enter:
  59             case QEvent::Leave:
  60             case QEvent::FocusOut:
  61                 if( !dynamic_cast<Amarok::ToolTip*>( kapp->widgetAt( QCursor::pos(), true ) ) )
  62                     Amarok::ToolTip::hideTips();
  63             default: break;
  64         }
  65
  66         return false;
  67     }
  68 };
  69
  70 Amarok::ToolTip::Manager* Amarok::ToolTip::s_manager = 0;
  71 QPoint Amarok::ToolTip::s_pos;
  72 QRect Amarok::ToolTip::s_rect;
  73 QString Amarok::ToolTip::s_text;
  74 Q3ValueList<Amarok::ToolTip*> Amarok::ToolTip::s_tooltips;
  75 int Amarok::ToolTip::s_hack = 0;
  76
  77 void Amarok::ToolTip::add( ToolTipClient *client, QWidget *parent ) //static
  78 {
  79     //if( !s_manager )
  80     //    s_manager = new Amarok::ToolTip::Manager( kapp );
  81     //new ToolTip( client, parent );
  82 }
  83
  84 void Amarok::ToolTip::remove( QWidget *widget ) //static
  85 {
  86     //for( int i = s_tooltips.count() - 1; i >= 0; --i )
  87     //    if( s_tooltips[i]->QToolTip::parentWidget() == widget )
  88     //        delete s_tooltips[i];
  89 }
  90
  91 void Amarok::ToolTip::hideTips() //static
  92 {
  93     //for( int i = 0, n = s_tooltips.count(); i < n; ++i )
  94     //    s_tooltips[i]->hideTip();
  95     //QToolTip::hide();
  96 }
  97
  98 QString Amarok::ToolTip::textFor( QWidget *widget, const QPoint &pos ) //static
  99 {
 100     /*for( int i = 0, n = s_tooltips.count(); i < n; ++i )
 101         if( s_tooltips[i]->QToolTip::parentWidget() == widget )
 102             return s_tooltips[i]->m_client->toolTipText( widget, pos ).first;
 103     return QToolTip::textFor( widget, pos );*/
 104     return QString();
 105 }
 106
 107 void Amarok::ToolTip::updateTip() //static
 108 {
 109     for( int i = 0, n = s_tooltips.count(); i < n; ++i )
 110         if( s_tooltips[i]->isVisible() )
 111         {
 112             /*QWidget* const w = s_tooltips[i]->QToolTip::parentWidget();
 113             QPair<QString, QRect> p = s_tooltips[i]->m_client->toolTipText( w, w->mapFromGlobal( s_pos ) );
 114             QString prev = s_text;
 115             if( prev != p.first )
 116             {
 117                 s_text = p.first;
 118                 s_rect = p.second;
 119                 s_tooltips[i]->showTip();
 120             }*/
 121             break;
 122         }
 123 }
 124
 125 Amarok::ToolTip::ToolTip( ToolTipClient *client, QWidget *parent )
 126     : QFrame(0,  0, Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_Tool | Qt::WStyle_StaysOnTop | Qt::WX11BypassWM | Qt::WNoAutoErase ),
 127 //      QToolTip( ),
 128       m_client( client )
 129 {
 130     s_tooltips.append( this );
 131     QFrame::setPalette( QToolTip::palette() );
 132     connect( &m_timer, SIGNAL( timeout() ), this, SLOT( hideTip() ) );
 133 }
 134
 135 Amarok::ToolTip::~ToolTip()
 136 {
 137     s_tooltips.remove( this );
 138 }
 139
 140 void Amarok::ToolTip::maybeTip( const QPoint &pos )
 141 {
 142     /*s_pos = QToolTip::parentWidget()->mapToGlobal( pos );
 143     QString prev = s_text;
 144     QPair<QString, QRect> p = m_client->toolTipText( QToolTip::parentWidget(), pos );
 145     s_text = p.first;
 146     s_rect = p.second;
 147     if( QToolTip::parentWidget() && !s_text.isEmpty() )
 148     {
 149         if( s_text != prev )
 150             hideTips();
 151         showTip();
 152     }
 153     else
 154         hideTips();*/
 155 }
 156
 157 void Amarok::ToolTip::showTip()
 158 {
 159     m_timer.start( 15000, true );
 160     if( !isVisible() || sizeHint() != size() )
 161     {
 162         resize( sizeHint() );
 163         position();
 164     }
 165     if( !isVisible() )
 166         show();
 167     else
 168         update();
 169 }
 170
 171 void Amarok::ToolTip::hideTip()
 172 {
 173     if( !isVisible() )
 174         return;
 175     QFrame::hide();
 176     //QToolTip::parentWidget()->update();
 177     m_timer.stop();
 178     s_hack = 0;
 179 }
 180
 181 void Amarok::ToolTip::drawContents( QPainter *painter )
 182 {
 183     /*QPixmap buf( width(), height() );
 184     QPainter p( &buf );
 185     buf.fill( colorGroup().background() );
 186
 187     p.setPen( colorGroup().foreground() );
 188     p.drawRect( buf.rect() );
 189
 190     Q3SimpleRichText text( s_text, QToolTip::parentWidget()->font() );
 191     text.setWidth( width() );
 192     p.translate( 0, height() / 2 - text.height() / 2);
 193     QPoint pos = s_rect.isNull() ? QPoint(2, -1)
 194                : s_hack == 1     ? QPoint(4, -2)
 195                : QPoint(2, -2); //HACK positioning
 196     p.setFont( QToolTip::parentWidget()->font() );
 197     text.draw( &p, pos.x(), pos.y(), rect(), colorGroup() );
 198
 199     painter->drawPixmap( 0, 0, buf );*/
 200 }
 201
 202 QSize Amarok::ToolTip::sizeHint() const
 203 {
 204     if( !s_rect.isNull() )
 205         return s_rect.size();
 206     else
 207     {
 208         //Q3SimpleRichText text( s_text, QToolTip::parentWidget()->font() );
 209         //text.setWidth( 500 ); //is this reasonable?
 210         //return QSize( text.widthUsed() - 2, text.height() );
 211         return QSize(0,0);
 212     }
 213 }
 214
 215 void Amarok::ToolTip::position()
 216 {
 217     /*const QRect drect = QApplication::desktop()->availableGeometry( QToolTip::parentWidget() );
 218     const QSize size = sizeHint();
 219     const int width = size.width(), height = size.height();
 220     QPoint pos;
 221     if( !s_rect.isNull() )
 222     {
 223         pos = s_rect.topLeft();
 224         if( pos.y() + height > drect.bottom() )
 225             pos.setY( qMax( drect.top(), drect.bottom() - height ) );
 226         if( pos.x() + width > drect.right() )
 227             pos.setX( qMax( drect.left(), drect.right() - width ) );
 228     }
 229     else
 230     {
 231         const QRect r = QRect( QToolTip::parentWidget()->mapToGlobal( QToolTip::parentWidget()->pos() ), QToolTip::parentWidget()->size() );
 232         pos = r.bottomRight();
 233         if( pos.y() + height > drect.bottom() )
 234             pos.setY( qMax( drect.top(), r.top() - height ) );
 235         if( pos.x() + width > drect.right() )
 236             pos.setX( qMax( drect.left(), r.left() - width ) );
 237     }
 238
 239     move( pos );*/
 240 }
 241
 242 #include "tooltip.moc"